Chair frame



FIG. 1 is a perspective view of a chair frame which illustrates the new design;

FIG. 2 is a side elevation view thereof;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is an enlarged sectional view taken along line 6--6 of FIG. 2;

FIG. 7 is an enlarged sectional view taken along line 7--7 of FIG. 2; and,

FIG. 8 is an enlarged sectional view taken along line 8--8 ofFIG. 3. 

The ornamental design for a chair frame, as shown and described. 